The wind is blowing and it's cold (the Texas version of cold) here today so it's not a good day to shoot outdoor macro photos. I'm a little bit stubborn and I decided to go outside and give it a try anyway. In a bold move, I took off my glove and shot an image of my nude left index finger at 3X :p
EOS 1D MKIV manual
MP-E65 at 3x with ring flash on manual and I believe 1/8th power. Both the camera and the finger were hand held :D
ISO 100
1/100s@ f16
It was hard to tell what was sensor dust and what was dirt and particles imbedded into the skin.